Steam boiler



(No Model.) 4 Sheets-Sheet 1.

R. JOY.

, STEAM BOILER. N0. 580,867. Patented Apr. 20, 1897.

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(No Model.) 4 Sheets-Sheet 2.

R. JOY. STEAM BOILER.

' No. 580,867. Patented Apr. 20, 1897.

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No. 580,867. Patented Apr. 2 0, 1897.

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NITED STATES PATENT OFFICE.

ROBERT JOY, OF OSVEGO, NEW YORK, ASSIGNOR TO THOMSON KINGSFORD,

" OF SAME PLACE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 580,867, dated April 20, 1897.

Application filed March 5, 1896.

To all whom it may concern:

Be it known that I, ROBERT JOY, of Oswego, in the county of Oswego, in the State of New York, have invented new and useful Improvements in Steam-Boilers, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to the class of steamboilers which are placed in an upright position and are provided with vertical flues passing through the water-spaces of the boiler and receiving the products of combustion through them.

The invention consists in an improved organization of an upright return-flue boiler which is simplein construction and possesses a maximum amount of heating-surfaces disposed in the most effective manner and permitting free circulation of the water to and from said heating-surfaces, and also possesses other advantages, as hereinafter described.

In the annexed drawings, Figure 1 is a front elevation of a steam-boiler embodying my invention. A portion of the boiler-shell is broken away to show the interior of the boiler. Fig. 2 is acentral vertical section from the front to the rear of the boiler; and Figs. 3 and 4 are horizontal transverse sections, respectively, on lines X X and Y Y in Fig. 2.

Similar letters of reference indicate corre sponding parts.

A denotes the boiler-shell, which is preferably of cylindrical shape and is placed in an upright position.

B represents the fire-box, which is located in the lower portion of the boiler-shell and has, preferably, its vertical walls extending below the grate C to form the ash-pit D. Said fire-box I prefer to form also cylindrical and place the same eccentric to the boilershell, as more clearly shown in Figs. 3 and 4 of the drawings and for the purpose hereinafter explained.

The fire-box is surrounded by a waterspace a, the bottom of which is formed of a horizontal plate 11, arranged nearly in the plane with the fire-grate and secured to the boiler-shell and fire-box shell. By means of the plate I) a smoke-flue e is formed in the base of the boiler-shell and around the ash- Serial No. 581,874. (No model.)

pit D. In the upper part of the boiler-shell is arranged a combustion-chamber F, which is conical in shape and secured at its small end to the flange of an opening in the top plate of the boiler-shell. Said end of the combustion-chamber is provided with a removable top plate G for the purpose of affording access to the fire-fines hereinafter described. In order to brace the sloping wall of the combustion-chamber so as to obviate the use of the expensive stay-bolts for said purpose and at the same time to enlarge the heating-sun faces of the said combustion-chamber and increase the efiiciency thereof, I form the circumferential wall thereof corrugated from the top to the bottom, as shown at f. Said corrugated wall I prefer to form of sheet steel or iron and of vertical sections pressed into their corrugated shape by means of suitable dies in ahydraulic press, which sections are subsequently united by rivets or otherwise to form water-tight joints.

In order to protect the top plate G from excessive heat, I form the same of two metal sheets with asbestos or other non-heating material h packed between them and tied together by means of rivets '5 i. From the top of the fire-box B tothe combustion-chamber .F extend vertically the direct fiues Z l, and from the bottom of the combustion-chamber to the smoke-flue e extend the return-fines Z.

By the eccentric arrangement of the firebox in relation to the boiler-shell, as hereinbefore stated, I obtain an enlargement of the water-space at around the rear portion of the fire-box, and in this enlarged portion of the water-space are arranged the series of ret urnflues Z.

To the rear portion of the boiler I attach the smoke-chamber H, which communicates at its base with the smoke-flue e and has attached to it the exit-pipe I.

The smoke-box H is formed with forwardlydiverging side walls, so as to cause said smokebox to extend nearly half-way around the boiler-shell, to which they are attached, as shown in Fig. 3 of the drawings. In this manner nearly the entire rear portion of said shell is inclosed and made to serve as the front wall of the smoke-box. Said portion of the boilershell is thus exposed to the heat of the prodnets of combustion entering the smoke-box,

and therefore the efficiency of the boiler is enhanced.

It will be observed that by the described arrangement of the return-fines Z back of the fire-box and smoke-box H back of the said return-fines the products of combustion pass from the direct flues l rearward to the returnflues Z and thence down through the latter fines again rearward to the smoke-box H, from whence they escape through the exit-pipe I. Said successive rearward travel of the prodnets of combustion facilitates the circulation of the same and at the same time thoroughly heats the return-fines and back portion of the boiler-shell, from which the heat is readily absorbed by the water, which is permitted a free circulation through the boiler.

What I claim as my invention is 1. The herein-described steam-boiler, c01nprising the shell, the fire-box, located eccentrically within the lower portion of the shell, the smoke-box at the rear of the shell having forwardly diverging sides attached to the sides thereof, the horizontal plate extending from the fire-box to the wall of the shell to form a sm oke-chamber in the lower end of the boiler, said smoke-chamber being in open communication with the smoke-box, a conical corrugated combustion-chamber above the fire-box and within the shell, fire-tubes leading from the top of the fire-box to said combustion-chamber, and return smoke-fiues leading from said combustion-chamber to said smoke-chamber.

2. In a steam-boiler, the combination with the shell, of a lire-box in the lower portion thereof, a horizontal plate arranged to form a smoke-chamber in the lower part of the shell, a smoke-flue leading from said chamber, a conical corrugated combustion-chamber located within the shell and above the fire-box, the upper end of said combustion-chamber extending to the top of the shell, a removable cap closing said upper end, fire-tubes leading from the fire-box to the combustion-ch amber, and return smoke-fines leading from the combustion-chamber to the smoke-chamber.

In testimony whereof I have hereunto signed my name this 3d day of February, 1896.

ROBERT JOY. [L. s]

itnesses:

J. J. LAASS, M. A. LEYDEN. 

